Here are links to recommended third-party resources I recommend to my clients:

Books

The Tao of Twitter – If you’re trying to get a handle on Twitter and how it can help your business, this book is a great place to start. It offers both practical advice for building your business’s influence, and it teaches you how to have fun while you are doing it.

SEO (Search Engine Optimization)

Scribe Content Library – Brought to you by the people behind Scribe SEO, this series of ebooks is a valuable resource for helping you develop online marketing strategies.

WordPress Plugins

Scribe SEO – This is a WordPress plugin which coaches you on how to optimize your content for Search Engine Optimization (SEO). It works by showing you the keywords to use before you write, optimizing your keywords after you write, analyzing your content in order to tweak it for search engines, helping you build back links, and helping you identify the social media influences who want to share your stuff.